Revert "RCC refactor, bugfixes"

This reverts commit e4807a5010f59ab863ad2c96dc14caf65bf1ae60.

1 files changed, 112 insertions, 429 deletions

diff --git a/libmaple/rcc.h b/libmaple/rcc.h
index 83b34ed..8697e01 100644
--- a/libmaple/rcc.h
+++ b/libmaple/rcc.h
@@ -24,7 +24,7 @@
 
 /**
  * @file rcc.h
- * @brief Reset and clock control (RCC) definitions and prototypes
+ * @brief reset and clock control definitions and prototypes
  */
 
 #include "libmaple_types.h"
@@ -36,451 +36,78 @@
 extern "C"{
 #endif
 
-/** RCC register map type */
-typedef struct rcc_reg_map {
-    __io uint32 CR;             /**< Clock control register  */
-    __io uint32 CFGR;           /**< Clock configuration register  */
-    __io uint32 CIR;            /**< Clock interrupt register */
-    __io uint32 APB2RSTR;       /**< APB2 peripheral reset register */
-    __io uint32 APB1RSTR;       /**< APB1 peripheral reset register */
-    __io uint32 AHBENR;         /**< AHB peripheral clock enable register */
-    __io uint32 APB2ENR;        /**< APB2 peripheral clock enable register */
-    __io uint32 APB1ENR;        /**< APB1 peripheral clock enable register */
-    __io uint32 BDCR;           /**< Backup domain control register  */
-    __io uint32 CSR;            /**< Control/status register  */
-} rcc_reg_map;
-
-/*
- * RCC register map base address
- */
-
-#define RCC_BASE                        ((rcc_reg_map*)0x40021000)
-
-/*
- * RCC register bit definitions
- */
-
-/* Clock control register */
-
-#define RCC_CR_PLLRDY_BIT               25
-#define RCC_CR_PLLON_BIT                24
-#define RCC_CR_CSSON_BIT                19
-#define RCC_CR_HSEBYP_BIT               18
-#define RCC_CR_HSERDY_BIT               17
-#define RCC_CR_HSEON_BIT                16
-#define RCC_CR_HSIRDY_BIT                1
-#define RCC_CR_HSION_BIT                 0
-
-#define RCC_CR_PLLRDY                   BIT(RCC_CR_PLLRDY_BIT)
-#define RCC_CR_PLLON                    BIT(RCC_CR_PLLON_BIT)
-#define RCC_CR_CSSON                    BIT(RCC_CR_CSSON_BIT)
-#define RCC_CR_HSEBYP                   BIT(RCC_CR_HSEBYP_BIT)
-#define RCC_CR_HSERDY                   BIT(RCC_CR_HSERDY_BIT)
-#define RCC_CR_HSEON                    BIT(RCC_CR_HSEON_BIT)
-#define RCC_CR_HSICAL                   (0xFF << 8)
-#define RCC_CR_HSITRIM                  (0x1F << 3)
-#define RCC_CR_HSIRDY                   BIT(RCC_CR_HSIRDY_BIT)
-#define RCC_CR_HSION                    BIT(RCC_CR_HSION_BIT)
-
-/* Clock configuration register */
-
-#define RCC_CFGR_USBPRE_BIT             22
-#define RCC_CFGR_PLLXTPRE_BIT           17
-#define RCC_CFGR_PLLSRC_BIT             16
-
-#define RCC_CFGR_MCO                    (0x7 << 24)
-#define RCC_CFGR_USBPRE                 BIT(RCC_CFGR_USBPRE_BIT)
-#define RCC_CFGR_PLLMUL                 (0xF << 18)
-#define RCC_CFGR_PLLMUL_2               (0x0 << 18)
-#define RCC_CFGR_PLLMUL_3               (0x1 << 18)
-#define RCC_CFGR_PLLMUL_4               (0x2 << 18)
-#define RCC_CFGR_PLLMUL_5               (0x3 << 18)
-#define RCC_CFGR_PLLMUL_6               (0x4 << 18)
-#define RCC_CFGR_PLLMUL_7               (0x5 << 18)
-#define RCC_CFGR_PLLMUL_8               (0x6 << 18)
-#define RCC_CFGR_PLLMUL_9               (0x7 << 18)
-#define RCC_CFGR_PLLMUL_10              (0x8 << 18)
-#define RCC_CFGR_PLLMUL_11              (0x9 << 18)
-#define RCC_CFGR_PLLMUL_12              (0xA << 18)
-#define RCC_CFGR_PLLMUL_13              (0xB << 18)
-#define RCC_CFGR_PLLMUL_14              (0xC << 18)
-#define RCC_CFGR_PLLMUL_15              (0xD << 18)
-#define RCC_CFGR_PLLMUL_16              (0xE << 18)
-#define RCC_CFGR_PLLXTPRE               BIT(RCC_CFGR_PLLXTPRE_BIT)
-#define RCC_CFGR_PLLSRC                 BIT(RCC_CFGR_PLLSRC_BIT)
-#define RCC_CFGR_PLLSRC_HSI_DIV_2       (0 << RCC_CFGR_PLLSRC_BIT)
-#define RCC_CFGR_PLLSRC_HSE             (1 << RCC_CFGR_PLLSRC_BIT)
-#define RCC_CFGR_ADCPRE                 (0x3 << 14)
-#define RCC_CFGR_PPRE2                  (0x7 << 11)
-#define RCC_CFGR_PPRE1                  (0x7 << 8)
-#define RCC_CFGR_HPRE                   (0xF << 4)
-#define RCC_CFGR_SWS                    (0x3 << 2)
-#define RCC_CFGR_SWS_PLL                (0x2 << 2)
-#define RCC_CFGR_SWS_HSE                (0x1 << 2)
-#define RCC_CFGR_SW                     (0x3 << 0)
-#define RCC_CFGR_SW_PLL                 (0x2 << 0)
-#define RCC_CFGR_SW_HSE                 (0x1 << 0)
-
-/* Clock interrupt register */
-
-#define RCC_CIR_CSSC_BIT                23
-#define RCC_CIR_PLLRDYC_BIT             20
-#define RCC_CIR_HSERDYC_BIT             19
-#define RCC_CIR_HSIRDYC_BIT             18
-#define RCC_CIR_LSERDYC_BIT             17
-#define RCC_CIR_LSIRDYC_BIT             16
-#define RCC_CIR_PLLRDYIE_BIT            12
-#define RCC_CIR_HSERDYIE_BIT            11
-#define RCC_CIR_HSIRDYIE_BIT            10
-#define RCC_CIR_LSERDYIE_BIT             9
-#define RCC_CIR_LSIRDYIE_BIT             8
-#define RCC_CIR_CSSF_BIT                 7
-#define RCC_CIR_PLLRDYF_BIT              4
-#define RCC_CIR_HSERDYF_BIT              3
-#define RCC_CIR_HSIRDYF_BIT              2
-#define RCC_CIR_LSERDYF_BIT              1
-#define RCC_CIR_LSIRDYF_BIT              0
-
-#define RCC_CIR_CSSC                    BIT(RCC_CIR_CSSC_BIT)
-#define RCC_CIR_PLLRDYC                 BIT(RCC_CIR_PLLRDYC_BIT)
-#define RCC_CIR_HSERDYC                 BIT(RCC_CIR_HSERDYC_BIT)
-#define RCC_CIR_HSIRDYC                 BIT(RCC_CIR_HSIRDYC_BIT)
-#define RCC_CIR_LSERDYC                 BIT(RCC_CIR_LSERDYC_BIT)
-#define RCC_CIR_LSIRDYC                 BIT(RCC_CIR_LSIRDYC_BIT)
-#define RCC_CIR_PLLRDYIE                BIT(RCC_CIR_PLLRDYIE_BIT)
-#define RCC_CIR_HSERDYIE                BIT(RCC_CIR_HSERDYIE_BIT)
-#define RCC_CIR_HSIRDYIE                BIT(RCC_CIR_HSIRDYIE_BIT)
-#define RCC_CIR_LSERDYIE                BIT(RCC_CIR_LSERDYIE_BIT)
-#define RCC_CIR_LSIRDYIE                BIT(RCC_CIR_LSIRDYIE_BIT)
-#define RCC_CIR_CSSF                    BIT(RCC_CIR_CSSF_BIT)
-#define RCC_CIR_PLLRDYF                 BIT(RCC_CIR_PLLRDYF_BIT)
-#define RCC_CIR_HSERDYF                 BIT(RCC_CIR_HSERDYF_BIT)
-#define RCC_CIR_HSIRDYF                 BIT(RCC_CIR_HSIRDYF_BIT)
-#define RCC_CIR_LSERDYF                 BIT(RCC_CIR_LSERDYF_BIT)
-#define RCC_CIR_LSIRDYF                 BIT(RCC_CIR_LSIRDYF_BIT)
-
-/* APB2 peripheral reset register */
-
-#define RCC_APB2RSTR_TIM11RST_BIT       21
-#define RCC_APB2RSTR_TIM10RST_BIT       20
-#define RCC_APB2RSTR_TIM9RST_BIT        19
-#define RCC_APB2RSTR_ADC3RST_BIT        15
-#define RCC_APB2RSTR_USART1RST_BIT      14
-#define RCC_APB2RSTR_TIM8RST_BIT        13
-#define RCC_APB2RSTR_SPI1RST_BIT        12
-#define RCC_APB2RSTR_TIM1RST_BIT        11
-#define RCC_APB2RSTR_ADC2RST_BIT        10
-#define RCC_APB2RSTR_ADC1RST_BIT         9
-#define RCC_APB2RSTR_IOPGRST_BIT         8
-#define RCC_APB2RSTR_IOPFRST_BIT         7
-#define RCC_APB2RSTR_IOPERST_BIT         6
-#define RCC_APB2RSTR_IOPDRST_BIT         5
-#define RCC_APB2RSTR_IOPCRST_BIT         4
-#define RCC_APB2RSTR_IOPBRST_BIT         3
-#define RCC_APB2RSTR_IOPARST_BIT         2
-#define RCC_APB2RSTR_AFIORST_BIT         0
-
-#define RCC_APB2RSTR_TIM11RST           BIT(RCC_APB2RSTR_TIM11RST_BIT)
-#define RCC_APB2RSTR_TIM10RST           BIT(RCC_APB2RSTR_TIM10RST_BIT)
-#define RCC_APB2RSTR_TIM9RST            BIT(RCC_APB2RSTR_TIM9RST_BIT)
-#define RCC_APB2RSTR_ADC3RST            BIT(RCC_APB2RSTR_ADC3RST_BIT)
-#define RCC_APB2RSTR_USART1RST          BIT(RCC_APB2RSTR_USART1RST_BIT)
-#define RCC_APB2RSTR_TIM8RST            BIT(RCC_APB2RSTR_TIM8RST_BIT)
-#define RCC_APB2RSTR_SPI1RST            BIT(RCC_APB2RSTR_SPI1RST_BIT)
-#define RCC_APB2RSTR_TIM1RST            BIT(RCC_APB2RSTR_TIM1RST_BIT)
-#define RCC_APB2RSTR_ADC2RST            BIT(RCC_APB2RSTR_ADC2RST_BIT)
-#define RCC_APB2RSTR_ADC1RST            BIT(RCC_APB2RSTR_ADC1RST_BIT)
-#define RCC_APB2RSTR_IOPGRST            BIT(RCC_APB2RSTR_IOPGRST_BIT)
-#define RCC_APB2RSTR_IOPFRST            BIT(RCC_APB2RSTR_IOPFRST_BIT)
-#define RCC_APB2RSTR_IOPERST            BIT(RCC_APB2RSTR_IOPERST_BIT)
-#define RCC_APB2RSTR_IOPDRST            BIT(RCC_APB2RSTR_IOPDRST_BIT)
-#define RCC_APB2RSTR_IOPCRST            BIT(RCC_APB2RSTR_IOPCRST_BIT)
-#define RCC_APB2RSTR_IOPBRST            BIT(RCC_APB2RSTR_IOPBRST_BIT)
-#define RCC_APB2RSTR_IOPARST            BIT(RCC_APB2RSTR_IOPARST_BIT)
-#define RCC_APB2RSTR_AFIORST            BIT(RCC_APB2RSTR_AFIORST_BIT)
-
-/* APB1 peripheral reset register */
-
-#define RCC_APB1RSTR_DACRST_BIT         29
-#define RCC_APB1RSTR_PWRRST_BIT         28
-#define RCC_APB1RSTR_BKPRST_BIT         27
-#define RCC_APB1RSTR_CANRST_BIT         25
-#define RCC_APB1RSTR_USBRST_BIT         23
-#define RCC_APB1RSTR_I2C2RST_BIT        22
-#define RCC_APB1RSTR_I2C1RST_BIT        21
-#define RCC_APB1RSTR_UART5RST_BIT       20
-#define RCC_APB1RSTR_UART4RST_BIT       19
-#define RCC_APB1RSTR_UART3RST_BIT       18
-#define RCC_APB1RSTR_UART2RST_BIT       17
-#define RCC_APB1RSTR_SPI3RST_BIT        15
-#define RCC_APB1RSTR_SPI2RST_BIT        14
-#define RCC_APB1RSTR_WWDGRST_BIT        11
-#define RCC_APB1RSTR_TIM14RST_BIT        8
-#define RCC_APB1RSTR_TIM13RST_BIT        7
-#define RCC_APB1RSTR_TIM12RST_BIT        6
-#define RCC_APB1RSTR_TIM7RST_BIT         5
-#define RCC_APB1RSTR_TIM6RST_BIT         4
-#define RCC_APB1RSTR_TIM5RST_BIT         3
-#define RCC_APB1RSTR_TIM4RST_BIT         2
-#define RCC_APB1RSTR_TIM3RST_BIT         1
-#define RCC_APB1RSTR_TIM2RST_BIT         0
-
-#define RCC_APB1RSTR_DACRST             BIT(RCC_APB1RSTR_DACRST_BIT)
-#define RCC_APB1RSTR_PWRRST             BIT(RCC_APB1RSTR_PWRRST_BIT)
-#define RCC_APB1RSTR_BKPRST             BIT(RCC_APB1RSTR_BKPRST_BIT)
-#define RCC_APB1RSTR_CANRST             BIT(RCC_APB1RSTR_CANRST_BIT)
-#define RCC_APB1RSTR_USBRST             BIT(RCC_APB1RSTR_USBRST_BIT)
-#define RCC_APB1RSTR_I2C2RST            BIT(RCC_APB1RSTR_I2C2RST_BIT)
-#define RCC_APB1RSTR_I2C1RST            BIT(RCC_APB1RSTR_I2C1RST_BIT)
-#define RCC_APB1RSTR_UART5RST           BIT(RCC_APB1RSTR_UART5RST_BIT)
-#define RCC_APB1RSTR_UART4RST           BIT(RCC_APB1RSTR_UART4RST_BIT)
-#define RCC_APB1RSTR_UART3RST           BIT(RCC_APB1RSTR_UART3RST_BIT)
-#define RCC_APB1RSTR_UART2RST           BIT(RCC_APB1RSTR_UART2RST_BIT)
-#define RCC_APB1RSTR_SPI3RST            BIT(RCC_APB1RSTR_SPI3RST_BIT)
-#define RCC_APB1RSTR_SPI2RST            BIT(RCC_APB1RSTR_SPI2RST_BIT)
-#define RCC_APB1RSTR_WWDGRST            BIT(RCC_APB1RSTR_WWDGRST_BIT)
-#define RCC_APB1RSTR_TIM14RST           BIT(RCC_APB1RSTR_TIM14RST_BIT)
-#define RCC_APB1RSTR_TIM13RST           BIT(RCC_APB1RSTR_TIM13RST_BIT)
-#define RCC_APB1RSTR_TIM12RST           BIT(RCC_APB1RSTR_TIM12RST_BIT)
-#define RCC_APB1RSTR_TIM7RST            BIT(RCC_APB1RSTR_TIM7RST_BIT)
-#define RCC_APB1RSTR_TIM6RST            BIT(RCC_APB1RSTR_TIM6RST_BIT)
-#define RCC_APB1RSTR_TIM5RST            BIT(RCC_APB1RSTR_TIM5RST_BIT)
-#define RCC_APB1RSTR_TIM4RST            BIT(RCC_APB1RSTR_TIM4RST_BIT)
-#define RCC_APB1RSTR_TIM3RST            BIT(RCC_APB1RSTR_TIM3RST_BIT)
-#define RCC_APB1RSTR_TIM2RST            BIT(RCC_APB1RSTR_TIM2RST_BIT)
-
-/* AHB peripheral clock enable register */
-
-#define RCC_AHBENR_SDIOEN_BIT           10
-#define RCC_AHBENR_FSMCEN_BIT            8
-#define RCC_AHBENR_CRCEN_BIT             6
-#define RCC_AHBENR_FLITFEN_BIT           4
-#define RCC_AHBENR_SRAMEN_BIT            2
-#define RCC_AHBENR_DMA2EN_BIT            1
-#define RCC_AHBENR_DMA1EN_BIT            0
-
-#define RCC_AHBENR_SDIOEN               BIT(RCC_AHBENR_SDIOEN_BIT)
-#define RCC_AHBENR_FSMCEN               BIT(RCC_AHBENR_FSMCEN_BIT)
-#define RCC_AHBENR_CRCEN                BIT(RCC_AHBENR_CRCEN_BIT)
-#define RCC_AHBENR_FLITFEN              BIT(RCC_AHBENR_FLITFEN_BIT)
-#define RCC_AHBENR_SRAMEN               BIT(RCC_AHBENR_SRAMEN_BIT)
-#define RCC_AHBENR_DMA2EN               BIT(RCC_AHBENR_DMA2EN_BIT)
-#define RCC_AHBENR_DMA1EN               BIT(RCC_AHBENR_DMA1EN_BIT)
-
-/* APB2 peripheral clock enable register */
-
-#define RCC_APB2ENR_TIM11EN_BIT         21
-#define RCC_APB2ENR_TIM10EN_BIT         20
-#define RCC_APB2ENR_TIM9EN_BIT          19
-#define RCC_APB2ENR_ADC3EN_BIT          15
-#define RCC_APB2ENR_USART1EN_BIT        14
-#define RCC_APB2ENR_TIM8EN_BIT          13
-#define RCC_APB2ENR_SPI1EN_BIT          12
-#define RCC_APB2ENR_TIM1EN_BIT          11
-#define RCC_APB2ENR_ADC2EN_BIT          10
-#define RCC_APB2ENR_ADC1EN_BIT           9
-#define RCC_APB2ENR_IOPGEN_BIT           8
-#define RCC_APB2ENR_IOPFEN_BIT           7
-#define RCC_APB2ENR_IOPEEN_BIT           6
-#define RCC_APB2ENR_IOPDEN_BIT           5
-#define RCC_APB2ENR_IOPCEN_BIT           4
-#define RCC_APB2ENR_IOPBEN_BIT           3
-#define RCC_APB2ENR_IOPAEN_BIT           2
-#define RCC_APB2ENR_AFIOEN_BIT           0
-
-#define RCC_APB2ENR_TIM11EN             BIT(RCC_APB2ENR_TIM11EN_BIT)
-#define RCC_APB2ENR_TIM10EN             BIT(RCC_APB2ENR_TIM10EN_BIT)
-#define RCC_APB2ENR_TIM9EN              BIT(RCC_APB2ENR_TIM9EN_BIT)
-#define RCC_APB2ENR_ADC3EN              BIT(RCC_APB2ENR_ADC3EN_BIT)
-#define RCC_APB2ENR_USART1EN            BIT(RCC_APB2ENR_USART1EN_BIT)
-#define RCC_APB2ENR_TIM8EN              BIT(RCC_APB2ENR_TIM8EN_BIT)
-#define RCC_APB2ENR_SPI1EN              BIT(RCC_APB2ENR_SPI1EN_BIT)
-#define RCC_APB2ENR_TIM1EN              BIT(RCC_APB2ENR_TIM1EN_BIT)
-#define RCC_APB2ENR_ADC2EN              BIT(RCC_APB2ENR_ADC2EN_BIT)
-#define RCC_APB2ENR_ADC1EN              BIT(RCC_APB2ENR_ADC1EN_BIT)
-#define RCC_APB2ENR_IOPGEN              BIT(RCC_APB2ENR_IOPGEN_BIT)
-#define RCC_APB2ENR_IOPFEN              BIT(RCC_APB2ENR_IOPFEN_BIT)
-#define RCC_APB2ENR_IOPEEN              BIT(RCC_APB2ENR_IOPEEN_BIT)
-#define RCC_APB2ENR_IOPDEN              BIT(RCC_APB2ENR_IOPDEN_BIT)
-#define RCC_APB2ENR_IOPCEN              BIT(RCC_APB2ENR_IOPCEN_BIT)
-#define RCC_APB2ENR_IOPBEN              BIT(RCC_APB2ENR_IOPBEN_BIT)
-#define RCC_APB2ENR_IOPAEN              BIT(RCC_APB2ENR_IOPAEN_BIT)
-#define RCC_APB2ENR_AFIOEN              BIT(RCC_APB2ENR_AFIOEN_BIT)
-
-/* APB1 peripheral clock enable register */
-
-#define RCC_APB1ENR_DACEN_BIT           29
-#define RCC_APB1ENR_BKPEN_BIT           27
-#define RCC_APB1ENR_PWREN_BIT           28
-#define RCC_APB1ENR_CANEN_BIT           25
-#define RCC_APB1ENR_USBEN_BIT           23
-#define RCC_APB1ENR_I2C2EN_BIT          22
-#define RCC_APB1ENR_I2C1EN_BIT          21
-#define RCC_APB1ENR_UART5EN_BIT         20
-#define RCC_APB1ENR_UART4EN_BIT         19
-#define RCC_APB1ENR_UART3EN_BIT         18
-#define RCC_APB1ENR_UART2EN_BIT         17
-#define RCC_APB1ENR_SPI3EN_BIT          15
-#define RCC_APB1ENR_SPI2EN_BIT          14
-#define RCC_APB1ENR_WWDGEN_BIT          11
-#define RCC_APB1ENR_TIM14EN_BIT          8
-#define RCC_APB1ENR_TIM13EN_BIT          7
-#define RCC_APB1ENR_TIM12EN_BIT          6
-#define RCC_APB1ENR_TIM7EN_BIT           5
-#define RCC_APB1ENR_TIM6EN_BIT           4
-#define RCC_APB1ENR_TIM5EN_BIT           3
-#define RCC_APB1ENR_TIM4EN_BIT           2
-#define RCC_APB1ENR_TIM3EN_BIT           1
-#define RCC_APB1ENR_TIM2EN_BIT           0
-
-#define RCC_APB1ENR_DACEN               BIT(RCC_APB1ENR_DACEN_BIT)
-#define RCC_APB1ENR_PWREN               BIT(RCC_APB1ENR_PWREN_BIT)
-#define RCC_APB1ENR_BKPEN               BIT(RCC_APB1ENR_BKPEN_BIT)
-#define RCC_APB1ENR_CANEN               BIT(RCC_APB1ENR_CANEN_BIT)
-#define RCC_APB1ENR_USBEN               BIT(RCC_APB1ENR_USBEN_BIT)
-#define RCC_APB1ENR_I2C2EN              BIT(RCC_APB1ENR_I2C2EN_BIT)
-#define RCC_APB1ENR_I2C1EN              BIT(RCC_APB1ENR_I2C1EN_BIT)
-#define RCC_APB1ENR_UART5EN             BIT(RCC_APB1ENR_UART5EN_BIT)
-#define RCC_APB1ENR_UART4EN             BIT(RCC_APB1ENR_UART4EN_BIT)
-#define RCC_APB1ENR_UART3EN             BIT(RCC_APB1ENR_UART3EN_BIT)
-#define RCC_APB1ENR_UART2EN             BIT(RCC_APB1ENR_UART2EN_BIT)
-#define RCC_APB1ENR_SPI3EN              BIT(RCC_APB1ENR_SPI3EN_BIT)
-#define RCC_APB1ENR_SPI2EN              BIT(RCC_APB1ENR_SPI2EN_BIT)
-#define RCC_APB1ENR_WWDGEN              BIT(RCC_APB1ENR_WWDGEN_BIT)
-#define RCC_APB1ENR_TIM14EN             BIT(RCC_APB1ENR_TIM14EN_BIT)
-#define RCC_APB1ENR_TIM13EN             BIT(RCC_APB1ENR_TIM13EN_BIT)
-#define RCC_APB1ENR_TIM12EN             BIT(RCC_APB1ENR_TIM12EN_BIT)
-#define RCC_APB1ENR_TIM7EN              BIT(RCC_APB1ENR_TIM7EN_BIT)
-#define RCC_APB1ENR_TIM6EN              BIT(RCC_APB1ENR_TIM6EN_BIT)
-#define RCC_APB1ENR_TIM5EN              BIT(RCC_APB1ENR_TIM5EN_BIT)
-#define RCC_APB1ENR_TIM4EN              BIT(RCC_APB1ENR_TIM4EN_BIT)
-#define RCC_APB1ENR_TIM3EN              BIT(RCC_APB1ENR_TIM3EN_BIT)
-#define RCC_APB1ENR_TIM2EN              BIT(RCC_APB1ENR_TIM2EN_BIT)
-
-/* Backup domain control register */
-
-#define RCC_BDCR_BDRST_BIT              16
-#define RCC_BDCR_RTCEN_BIT              15
-#define RCC_BDCR_LSEBYP_BIT              2
-#define RCC_BDCR_LSERDY_BIT              1
-#define RCC_BDCR_LSEON_BIT               0
-
-#define RCC_BDCR_BDRST                  BIT(RCC_BDCR_BDRST_BIT)
-#define RCC_BDCR_RTCEN                  BIT(RCC_BDCR_RTCEN_BIT)
-#define RCC_BDCR_RTCSEL                 (0x3 << 8)
-#define RCC_BDCR_RTCSEL_LSE             (0x1 << 8)
-#define RCC_BDCR_RTCSEL_LSI             (0x2 << 8)
-#define RCC_BDCR_RTCSEL_HSE_DIV_128     (0x3 << 8)
-#define RCC_BDCR_LSEBYP                 BIT(RCC_BDCR_LSEBYP_BIT)
-#define RCC_BDCR_LSERDY                 BIT(RCC_BDCR_LSERDY_BIT)
-#define RCC_BDCR_LSEON                  BIT(RCC_BDCR_LSEON_BIT)
-
-/* Control/status register */
-
-#define RCC_CSR_LPWRRSTF_BIT            31
-#define RCC_CSR_WWDGRSTF_BIT            30
-#define RCC_CSR_IWDGRSTF_BIT            29
-#define RCC_CSR_SFTRSTF_BIT             28
-#define RCC_CSR_PORRSTF_BIT             27
-#define RCC_CSR_PINRSTF_BIT             26
-#define RCC_CSR_RMVF_BIT                25
-#define RCC_CSR_LSIRDY_BIT               1
-#define RCC_CSR_LSION_BIT                0
-
-#define RCC_CSR_LPWRRSTF                BIT(RCC_CSR_LPWRRSTF_BIT)
-#define RCC_CSR_WWDGRSTF                BIT(RCC_CSR_WWDGRSTF_BIT)
-#define RCC_CSR_IWDGRSTF                BIT(RCC_CSR_IWDGRSTF_BIT)
-#define RCC_CSR_SFTRSTF                 BIT(RCC_CSR_SFTRSTF_BIT)
-#define RCC_CSR_PORRSTF                 BIT(RCC_CSR_PORRSTF_BIT)
-#define RCC_CSR_PINRSTF                 BIT(RCC_CSR_PINRSTF_BIT)
-#define RCC_CSR_RMVF                    BIT(RCC_CSR_RMVF_BIT)
-#define RCC_CSR_LSIRDY                  BIT(RCC_CSR_LSIRDY_BIT)
-#define RCC_CSR_LSION                   BIT(RCC_CSR_LSION_BIT)
-
-/**
- * Identifies bus and clock line for a device
- */
-typedef enum {
-    RCC_SRAM,
-    RCC_GPIOA,
-    RCC_GPIOB,
-    RCC_GPIOC,
-    RCC_GPIOD,
-    RCC_AFIO,
-    RCC_ADC1,
-    RCC_ADC2,
-    RCC_USART1,
-    RCC_USART2,
-    RCC_USART3,
-    RCC_TIMER1,
-    RCC_TIMER2,
-    RCC_TIMER3,
-    RCC_TIMER4,
-    RCC_SPI1,
-    RCC_SPI2,
-    RCC_DMA1,
-    RCC_PWR,
-    RCC_BKP,
-    RCC_CAN,
-    RCC_USB,
-    RCC_I2C1,
-    RCC_I2C2,
-    RCC_CRC,
-    RCC_WWDG,
-    RCC_FLITF,
-#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
-    RCC_SDIO,
-    RCC_FSMC,
-    RCC_GPIOE,
-    RCC_GPIOF,
-    RCC_GPIOG,
-    RCC_ADC3,
-    RCC_UART4,
-    RCC_UART5,
-    RCC_TIMER5,
-    RCC_TIMER6,
-    RCC_TIMER7,
-    RCC_TIMER8,
-    RCC_DAC,
-    RCC_DMA2,
-    RCC_SPI3,
-#endif
-#ifdef STM32_XL_DENSITY
-    RCC_TIMER9,
-    RCC_TIMER10,
-    RCC_TIMER11,
-    RCC_TIMER12,
-    RCC_TIMER13,
-    RCC_TIMER14,
-#endif
-} rcc_clk_id;
-
-/* SYSCLK source  */
+/* registers  */
+#define RCC_BASE               0x40021000
+#define RCC_CR                 (RCC_BASE + 0x0)
+#define RCC_CFGR               (RCC_BASE + 0x4)
+#define RCC_CIR                (RCC_BASE + 0x8)
+#define RCC_APB2RSTR           (RCC_BASE + 0xC)
+#define RCC_APB1RSTR           (RCC_BASE + 0x10)
+#define RCC_AHBENR             (RCC_BASE + 0x14)
+#define RCC_APB2ENR            (RCC_BASE + 0x18)
+#define RCC_APB1ENR            (RCC_BASE + 0x1C)
+#define RCC_BDCR               (RCC_BASE + 0x20)
+#define RCC_CSR                (RCC_BASE + 0x24)
+#define RCC_AHBSTR             (RCC_BASE + 0x28)
+#define RCC_CFGR2              (RCC_BASE + 0x2C)
+
+#define RCC_CFGR_USBPRE        (0x1 << 22)
+#define RCC_CFGR_ADCPRE        (0x3 << 14)
+#define RCC_CFGR_PPRE1         (0x7 << 8)
+#define RCC_CFGR_PPRE2         (0x7 << 11)
+#define RCC_CFGR_HPRE          (0xF << 4)
+#define RCC_CFGR_PLLSRC        (0x1 << 16)
+
+#define RCC_CFGR_SWS           (0x3 << 2)
+#define RCC_CFGR_SWS_PLL       (0x2 << 2)
+#define RCC_CFGR_SWS_HSE       (0x1 << 2)
+
+#define RCC_CFGR_SW            (0x3 << 0)
+#define RCC_CFGR_SW_PLL        (0x2 << 0)
+#define RCC_CFGR_SW_HSE        (0x1 << 0)
+
+/* CR status bits  */
+#define RCC_CR_HSEON           (0x1 << 16)
+#define RCC_CR_HSERDY          (0x1 << 17)
+#define RCC_CR_PLLON           (0x1 << 24)
+#define RCC_CR_PLLRDY          (0x1 << 25)
+
+#define RCC_WRITE_CFGR(val)    __write(RCC_CFGR, val)
+#define RCC_READ_CFGR()        __read(RCC_CFGR)
+
+#define RCC_WRITE_CR(val)      __write(RCC_CR, val)
+#define RCC_READ_CR()          __read(RCC_CR)
+
+/* sysclk source  */
 #define RCC_CLKSRC_HSI                          (0x0)
 #define RCC_CLKSRC_HSE                          (0x1)
 #define RCC_CLKSRC_PLL                          (0x2)
 
-/* ADC prescaler dividers */
+/* pll entry clock source  */
+#define RCC_PLLSRC_HSE                          (0x1 << 16)
+#define RCC_PLLSRC_HSI_DIV_2                    (0x0 << 16)
+
+/* adc prescaler dividers  */
 #define RCC_ADCPRE_PCLK_DIV_2                   (0x0 << 14)
 #define RCC_ADCPRE_PCLK_DIV_4                   (0x1 << 14)
 #define RCC_ADCPRE_PCLK_DIV_6                   (0x2 << 14)
 #define RCC_ADCPRE_PCLK_DIV_8                   (0x3 << 14)
 
-/* APB1 prescaler dividers */
+/* apb1 prescaler dividers  */
 #define RCC_APB1_HCLK_DIV_1                     (0x0 << 8)
 #define RCC_APB1_HCLK_DIV_2                     (0x4 << 8)
 #define RCC_APB1_HCLK_DIV_4                     (0x5 << 8)
 #define RCC_APB1_HCLK_DIV_8                     (0x6 << 8)
 #define RCC_APB1_HCLK_DIV_16                    (0x7 << 8)
 
-/* APB2 prescaler dividers */
+/* apb2 prescaler dividers  */
 #define RCC_APB2_HCLK_DIV_1                     (0x0 << 11)
 #define RCC_APB2_HCLK_DIV_2                     (0x4 << 11)
 #define RCC_APB2_HCLK_DIV_4                     (0x5 << 11)
 #define RCC_APB2_HCLK_DIV_8                     (0x6 << 11)
 #define RCC_APB2_HCLK_DIV_16                    (0x7 << 11)
 
-/* AHB prescaler dividers */
+/* ahb prescaler dividers  */
 #define RCC_AHB_SYSCLK_DIV_1                    (0x0 << 4)
 #define RCC_AHB_SYSCLK_DIV_2                    (0x8 << 4)
 #define RCC_AHB_SYSCLK_DIV_4                    (0x9 << 4)
@@ -492,19 +119,75 @@ typedef enum {
 #define RCC_AHB_SYSCLK_DIV_256                  (0xE << 4)
 #define RCC_AHB_SYSCLK_DIV_512                  (0xF << 4)
 
-/* Prescalers */
-typedef enum rcc_prescaler {
+/* pll multipliers  */
+#define RCC_PLLMUL_2                            (0x0 << 18)
+#define RCC_PLLMUL_3                            (0x1 << 18)
+#define RCC_PLLMUL_4                            (0x2 << 18)
+#define RCC_PLLMUL_5                            (0x3 << 18)
+#define RCC_PLLMUL_6                            (0x4 << 18)
+#define RCC_PLLMUL_7                            (0x5 << 18)
+#define RCC_PLLMUL_8                            (0x6 << 18)
+#define RCC_PLLMUL_9                            (0x7 << 18)
+#define RCC_PLLMUL_10                           (0x8 << 18)
+#define RCC_PLLMUL_11                           (0x9 << 18)
+#define RCC_PLLMUL_12                           (0xA << 18)
+#define RCC_PLLMUL_13                           (0xB << 18)
+#define RCC_PLLMUL_14                           (0xC << 18)
+#define RCC_PLLMUL_15                           (0xD << 18)
+#define RCC_PLLMUL_16                           (0xE << 18)
+
+
+/* prescalers */
+enum {
     RCC_PRESCALER_AHB,
     RCC_PRESCALER_APB1,
     RCC_PRESCALER_APB2,
     RCC_PRESCALER_USB,
     RCC_PRESCALER_ADC
-} rcc_prescaler;
+};
+
+/*
+ * Identifies bus and clock line for a device
+ */
+typedef enum {
+    RCC_GPIOA,
+    RCC_GPIOB,
+    RCC_GPIOC,
+    RCC_GPIOD,
+    RCC_GPIOE,       // High-density devices only (Maple Native)
+    RCC_GPIOF,       // High-density devices only (Maple Native)
+    RCC_GPIOG,       // High-density devices only (Maple Native)
+    RCC_AFIO,
+    RCC_ADC1,
+    RCC_ADC2,
+    RCC_ADC3,
+    RCC_USART1,
+    RCC_USART2,
+    RCC_USART3,
+    RCC_UART4,      // High-density devices only (Maple Native)
+    RCC_UART5,      // High-density devices only (Maple Native)
+    RCC_TIMER1,
+    RCC_TIMER2,
+    RCC_TIMER3,
+    RCC_TIMER4,
+    RCC_TIMER5,      // High-density devices only (Maple Native)
+    RCC_TIMER6,      // High-density devices only (Maple Native)
+    RCC_TIMER7,      // High-density devices only (Maple Native)
+    RCC_TIMER8,      // High-density devices only (Maple Native)
+    RCC_SPI1,
+    RCC_SPI2,
+    RCC_FSMC,        // High-density devices only (Maple Native)
+    RCC_DAC,         // High-density devices only (Maple Native)
+    RCC_DMA1,
+    RCC_DMA2,        // High-density devices only (Maple Native)
+    RCC_PWR,
+    RCC_BKP,
+} rcc_clk_id;
 
 void rcc_clk_init(uint32 sysclk_src, uint32 pll_src, uint32 pll_mul);
 void rcc_clk_enable(rcc_clk_id device);
 void rcc_reset_dev(rcc_clk_id device);
-void rcc_set_prescaler(rcc_prescaler prescaler, uint32 divider);
+void rcc_set_prescaler(uint32 prescaler, uint32 divider);
 
 #ifdef __cplusplus
 } // extern "C"